laird



J. F. LAI'RD.

Ore Stamp. No. 11,229. v Patented July 4, 1854.

JOSEPH F. LAIRD, OF PHILADELPHIA, PENNSYLVANIA.

ORE-STAMPING MACHINE.

Specification of Letters PatentlNo. 11,229, dated July 4, 1854:. i

To all whom it may concern Be it known that I, Jos. F, LAIRD, of the city and county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Ore-Stamping Machines; and I do hereby declare that the fol lowing is a full, clear, and eXact description of the same, reference being had to the accompanying drawings, making a part of this specification.

The advantage this invention has over that of WVm. Ball and others, is in the arrangement of the lifters operating on the adjustable weight affixed to the stamper rod, which in raising the stampers at the same time gives them a partial rotation, by an em ceeding simple contriyance, viz., by so placing the lifters relatively to the head on the stamper rod, that they shall lay hold on the periphery of the head in the act of rising and thus turn the stampers; thus dispensing with grooves, catches, dogs, &c., heretofore required to render the operation effective; it must be a simple contrivance to make a practical one if itis considered the great weight of the head and Stampers, and to make a good quartz crusher the stamper must be turned to prevent the undue wear of the face on the side where the rockis received in the mortar or bed; this irregularity of wear of the face of the stamper, it has been attempted to obviate by shifting by hand, and it is true that Ball has at tempted this turning, but it is by a complex arrangement, whichfrom slight causes have been found inoperative, whereasin my improved arrangement of the line or direction that the lifters assume on the axial line of the stamper head and its rod (by being placed on one side of the center of thehead) the most perfect efi'ect is produced, and the head and Stamper allowed freedom of descent without friction or obstruction.

At first glance it may be supposed this does not diifer from a rock drill to which a turning motion is given so as gradually to cut around the surface removed. by it, but such an instrument is not used for the purpose this invention is designed to accomplish. The rock drill cuts away the sur- ,face by light taps and generally is turned I by grooves on the under face of the head,'or

. of the Stampers.

pawls, &c., while my machine cracks and breaks up the masses of rock by the weight In the drawings A is the base of the machine on which the mortars are secured; B side sills; O a subsill for the mortars; D D uprights rising from base A, united with a head piece and crosspiece, through which the rods of the lifters pass.

E is the mortar; F a tappet head through which the rods Grpass; H, H the stampers, formed of simple cylinders with flat ends; I, I, I, three or more lifters on the shaft K; L the winch or handle, and M a case or :cover in which the stampersrise and on the top of which the water used, is received and I delivered to the stampers; a, a, a, series of projections on I, which coming in contact with the heads F upon one side of their center cause them partially to turn as they are lifted, simply by the adhesionof the lifters with the head.

The mode of using the crusher as fol lows: The broken rock having been thrown in the mortar E at the hopper in therear of the machine, a stream of water is turned on the top of the caphead Mwat the channel thereon; the stampers H being raised to different heights by the arrangement of the lifters I and, a a on the turning shaft K,

there being always two out of three on the lift while the third one is relieved from the lifter and on its descent. This division of the labor,possesses the advantage of regulating the power appliedwithout the intervention of a fiyor balance wheel. The bed or mortar is of the usual construction and is furnished with the grate or strainer common to others.

The quartz rock having been received from thehopper and the stamper having made its first stroke upon the mass, on its rise through the agency of the rod G and tappet head F it is turned partially by the arms a a of the lifter and after its second descent a new portion of the face of the stamper is brought in contact with the bulk of the rock near the hopper, and thus being continually turned, is worn with a regular face untila portion of the length of the stamper being reduced the diminished length may be accommodated by sliding the rod Gv' through the head F and secured by set screws.

Having thus fully set forth myimprovementin machines for stamping quartz rock, what I claim as my invention, and desire to secure by Letters Patent, is

The arrangement of the lifters, by being signed my name before tWo subscribing Wits? pfiaced as tip oiperatehon the periphery nesses. 0 t e tappet ea or t e purpose 0' iving the Stampers a partial rotation witli out JOSEPH LAIRD' 5 requiring other mechanism, in the manner Witnesses:

set forth. JOHN F. CLARK, In testimony whereof I have hereunto SAML. GRUBB. 

